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/*
* Copyright (C) 2008 Search Solution Corporation. All rights reserved by Search Solution.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* - Neither the name of the nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*
*/
package cubrid.jdbc.jci;
import java.util.ArrayList;
import java.util.Hashtable;
public class UUrlCache {
private Hashtable stmt_cache_table;
private ArrayList stmt_cache_remove_list;
UUrlCache() {
stmt_cache_table = new Hashtable(100, 5);
stmt_cache_remove_list = new ArrayList(100);
}
UStmtCache getStmtCache(String sql) {
UStmtCache stmt_cache;
synchronized (stmt_cache_table) {
stmt_cache = stmt_cache_table.get(sql);
if (stmt_cache == null) {
stmt_cache = new UStmtCache(sql);
stmt_cache_table.put(sql, stmt_cache);
synchronized (stmt_cache_remove_list) {
stmt_cache_remove_list.add(stmt_cache);
}
}
stmt_cache.incr_ref_count();
}
return stmt_cache;
}
void remove_expired_stmt(long checkTime) {
UStmtCache sc;
for (int i = 0; i < stmt_cache_remove_list.size(); i++) {
sc = stmt_cache_remove_list.get(i);
int res_count = sc.remove_expired_res(checkTime);
synchronized (stmt_cache_table) {
if (res_count <= 0 && sc.ref_count <= 0) {
stmt_cache_table.remove(sc.key);
synchronized (stmt_cache_remove_list) {
UStmtCache lastObj = stmt_cache_remove_list
.remove(stmt_cache_remove_list.size() - 1);
if (i < stmt_cache_remove_list.size()) {
stmt_cache_remove_list.set(i, lastObj);
i--;
}
}
}
}
}
}
}